Valve for gas-engines.



No. 718,299. PATENTED JAN. 13, 1903.

E. E. ARNOLD.

VALVE FOR GAS ENGINES APPLICATION FILED MAY 22, 1902..

N0 MODEL.

IIIIIIIIIIIII izq ezzzeaaeez za m 3 I as WITNESSES:

n4: perms anus co, PHOTO-L|THD., wAsmuu-rou. n16.

EDWIN E. ARNOLD, or PITTSBURG,

PAT NT OFFICE.

PENNSYLVANIA, ASSIGNOR TO THE "WESTINGHOUSE MACHINE COMPANY, A CORPORATION OF PENNSYL- VANIA.

VALVE FOR GAS-ENGINES.

SPECIFICATION formingpart of Iletters Patent No. 718,299, dated January 13, 1903- Application filed May 22, 1902.

T0 aZZ whom it may concern/r Be it known that I, EDWIN E. ARNOLD, a citizen of the United States, and a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Valves for Gas- Engines, of which the following is a specification.

My invention relates to valves for gas-engines, and particularly to devices of this character which are employed for controlling the exhaust-ports of such engines; and it has for its object to provide a horizontal valve of such construction that it may be readily ad justed totake up wear and secure proper co operative relation of parts and also be efficiently cooled.

For convenience of description the subjectmatter of my present invention will be set forth as a horizontal exhaust-valve for gasengihes; but I do not intend by so illustrating and describing the invention to limit itnecessarily to strictly horizontal valves or to such as are used only for controlling the exhaust-ports of gas-engines.

In using the term horizontal I intend to cover any valve the stem of which is disposed at such angle to the vertical that it is supported at one side, and if a valve containing the novel features, or any of them, which are here set forth; is found useful in connection with inlet-ports of gas-engines or in connection with either inlet or exhaust ports of engines of any other type or kind the terms here employed are not to be construed as restricting the invention to the specific relations shown.

In the accompanying drawings, Figure 1 is a view, partially in side elevation and partially in section, of a portion of a gas-engine frame or casing and an exhaust-valve c0nstructed in accordance with my invention and mounted thereon. Fig. 2 is a detail sectional view of an adjustable support for the valve-stem bearing. Fig. 3 is a detail view of a portion of the means for operating the valve. Figs. 4 and 5 are respectively an end elevation and a longitudinal section of' a guide packing-gland for the valve-stem.

The frame 1 of the engine, a portion only of which is shown, is'provided with an exhaust-port 2, leading to a chamber 3, from Serial No. 108,541. (No model.)

which the gaseous products of combustionare conducted away to any desired point by a suitable means. (Not shown.) The port 2 is normally closed by a hollow puppet-valve 4, having a hollow stem 5, of suitable length, which projects outwardly from the valvehead through a bushing 5, which may have suitable annular grooves 5", as indicated.

The outer end of the stem 5 is provided with a block 6, which is held rigidly in position between locking-nuts 7 and 8 and which is thereby adjustable to alimited extent along the axis of the valve-stem. The block is also provided with an oil-hole 9, which is made to register with a corresponding hole 9 in the valve-stem. Adjustably mounted upon the stem adjacent to the lock-nut 8 is a nut 10, against which bears one end of a coilspring 11. The other end of this spring engages the outer end of a hollow block 12, which is secured by suitable means to the frame 1 of the engine.

The block 6 is provided with pins or trun nions 13 at its sides, on which are mounted links 14, the free ends of said links being pivotally connected to the bifurcated lower end of a lever 15. The lever 15 is pivotally mounted intermediate its ends in a bracket 16, and its bifurcated free end is provided with a roller 17 which is engaged by a cam 18, mounted upon a shaft 19, the latter being driven from either the main or the governor shaft of the engine by any suitable gearing (not shown) in order that the lever 15 may be rocked at suitable intervals, so as to unseat the valve against the action of the spring 11.

The valve-stem 5 is internally supported by means of a tube 20, the outer end of which is located in and projects througha bar or block 21, which joins and constitutes a part of the arms 22 of a bracket of which the block 12 is the supporting-base. The tube 20 is clamped to the bar 21 by means of a nut 23 and is adjustably supported within the part 12 by means of the devices shown in detail in Fig. 2 and which comprise a screw-bolt 24,extending through a hole in the block 12 and securely fastened at its inner end by means of a screw connection with the tube, a nut 25, resting upon the head of the screw-bolt 24 and screwed into the block 12, and a sleeve or bushing .ing-gland 29.

26, the upper end of which is formed to fit the tube and the lower end of which rests in a seat in the nut 25.

A suitable removable cap 27 may be employed to cover the opening in which the above-mentioned parts are located.

It will be readily seen that by turning the nut in the one direction or the other the bushing or sleeve 26 will be raised or lowered, and thus adjust the tube 20, and with it the valve at and its stem 5, in order to take up wear and also to secure the initial adjustment desired.

The inner end of the supporting-tube 20 is reduced in diameter, as indicated at 28, and fits into a corresponding bore in a guide pack- This gland is provided with a plurality of holes 30 for the passage of cooling liquid. and with a central hole 31, through which projects a pipe 32, the inner end of which terminatesin theinterior of thehollow valve 4. The gland 29 is brazed or otherwise rigidly fastened to the tube 32, and the latter extends outwardly through the tube 20 and is brazed or otherwise securely attached to a tubular end piece 33 having adjusting and set nuts 3a. This piece 33 is surrounded by a gland 35, which fits into a recess in the outer end of the tube 20, and between the head of this gland and the inner nut 34 is placed a coiled spring 36, the function of this spring being to maintain proper adjustment of the parts and take up any wear which may occur in service.

The cooling of the valve and its stem is effected by the circulation of water or other suitable cooling liquid, which is supplied to the outer end of the tubular extension 33 of the pipe 32 and is withdrawn through the holes 30 in the gland 29, the space in the tube 20 between it and the pipe 32, and the chamber 37 in the head 21.

It will be seen from the foregoing description that the valve is effectively cooled and also that it is so supported that it maybe readily adjusted initially and also subsequently to take up wear without interfering with the proper support and operation.

The details of construction may obviously be varied within considerable limits without departing from the spirit and scope of myinvention, and consequently I do not desire to limit the invention except as limitations may be imposed by the prior art and expressly set forth in the claims.

I claim as my invention- 1. The combination with a hollow valve having a horizontally-projecting hollow stem, of an internal, tubular bearing for said stem, and means for supporting said bearing independently of the stem.

2. The combination with a spring-seated valve having a hollow stem, of a stationary bearing located in the stem and means for supporting the respective ends of the bearing.

3. The combination with a spring-seated valve having a hollow stem and means for periodically unseating the valve, of an internal bearing for the valve-stem, and means for supporting each end of the bearing, one of said means being adjustable.

4. The combination with a hollow valve having a hollow stem, of an internal, tubular bearing for said stem and a pipe extending through said bearing, the external diameter of which is less than the internal diameter of the bearing.

5. The combination with a hollow valve having a hollow stem, of a stationary tubein said stem, means for supporting the tube independently of the stem and a pipe extending through the tube the external diameter of which is less than the internal diameter of the tube.

6. The combination with a hollow valve having an approximately horizontal hollow stem, of a stationary tube in said stem having an outlet-port at or near its outer end, a pipe extending through said tube and having a guide packing-gland which engages the inner end of the tube and has passages leading to the interior of the tube.

7. In a gas-engine, the combination with a hollow exhaust valve having an approximately horizontal, hollow stem, a spring for seating the valve, and cam, lever-and-link mechanism for unseating it, of a stationary tube in the valve-stem and a pipe extending through the tube for the introduction of a cooling liquid into the valve.

8. In a gas-engine, the combination with a hollow exhaust-valve having a hollow stem, a spring for seating the valve and cam, leverand-link mechanism acting in opposition to the spring, of a tubular, internal bearing for the valve-stem, means for laterally adjusting one end of said bearing and a pipe extending through said bearing for introducing a cooling liquid into the valve.

9. The combination with a hollow Valve having an approximately horizontal hollow stem and means for moving said valve and stem longitudinally, of a stationary tube in said stem, and a bracket or frame for supporting said tube having means for laterally adjusting its inner end.

' 10. The combination with a hollow valve having a hollow stem, of a tubular, internal bearing for the ste1n,a pipe extending through said bearing and having a perforated, guide packing-gland which engages the inner end of the bearing, a packingland between the outer ends of the tubular bearing and the pipe and a spring interposed between the gland and a projection on the pipe.

11. The combination with a hollow valve having an approximately horizontal, hollow stem, of a tube fitted within said stem, a bracket or frame in which said tube is supported, a rod or bolt projecting downwardly from said tube, and an adjustable tube or bushing which surrounds said rod or bolt and upon which said tube rests.

12. The combination with a valve having a hollow stem projecting in an approximately ally from a vertical plane, of a stationary horizontal direction, of an internal bearing bearing located in the stem and means for for said stem and means for supporting the supporting said bearing independently of the bearing independently of the stem. stem.

5 13. The combination with a valve having a In testimony whereof I have hereunto sub- I5 hollow stem, of an internal bearing for said scribed my name this 19th day of May, 1902.

stern and a frame having means for engaging I E. E. ARNOLD. and supporting said bearing. Witnesses:

14. The combination with a valve having a LOUIS WIOHERT, :0 hollow stem the axis of which projects later- I J. A. MACMUROHY. 

